Make farm plots re-tillable in farming extension version 2

[silvadomi]

Summary

Bugfixes "Make farm plots re-tillable in farming extension version 2"

Purpose of change

Farming plots in the basecamp farming extension version 2 that have changed terrain (due to plants being harvested / smashed, dirt mounds being tamped, ...) could not be re-tilled through the basecamp mission menu even though there's a mission "Plow fields" intended to do this (issue #73761).

Describe the solution

This PR fixes this issue by making sure the field plots (dirt mounds) which have been built into the expansion are inserted correctly into the reference map which is used by the farming mission to check where tilling needs to be done (closes #73761).

The new code applies mapgen updates according to the upgrades which have been built into the expansion to the farming reference map.
This farming reference map is used by existing code to decide how many / where dirt mounds need to be put.

Since the new code requires access to the expansion's upgrade list, the calling interface needed to be changed slightly (make farm_action a member of basecamp class, use relative coordinates instead of absolute ones).

Describe alternatives you've considered

Missions to build farm plots, and the mission to (re-)plow fields is in a way two times the same thing. More extensive changes could try to unify that. That would go beyond what should be a direct bugfix though.

Testing

Made a field basecamp, created a farming extension version 1 in one tile, and three farming extensions version 2 (to test rotations and mirroring) in three other tiles. Built fields, planted a through seeds through the basecamp mission, went around and smashed plants / tamped dirt:

Coming back to the bulletin board shows the correct number of spaces to plow:

Performing the "Plow fields" mission in all expansions restores the reference state with dirt mounds, leaving existing plants intact:

Additional context

[silvadomi]

I did another test with one of the basecamps where farming is provided on the central tile (modular outpost normal), and with this fix re-tilling works as expected for this.

The farming expansion version 1 still might have issues beyond the first upgrade, I'll need to look more into this.

[silvadomi]

Had to replace tinymap by smallmap so that z levels in upgrade blueprints don't give debug messages during generation of the reference json map.

Farm expansion version 1 is now also tested, and re-tilling works there as well throughout the upgrade path. I realized the upgrade path seems a bit strange though: first upgrade adds three double-rows of plots, second upgrade starts the shed and does nothing else. However, after the second upgrade there's the option to "re"-plow a fourth double-row of farm plots, which were not created by the upgrade itself. Is this as intended? I think it has to do with these lines in primitive_farm.json:

        { "chunks": [ "bc_prim_farm_long_fields" ], "x": 1, "y": 6 },
        { "chunks": [ "bc_prim_farm_long_fields" ], "x": 9, "y": 6 },
        { "chunks": [ "bc_prim_farm_long_fields" ], "x": 17, "y": 6 }

which appear in both faction_base_field_camp_farm_1 and faction_base_field_camp_farm_2. It's strange that they seem to behave differently though for the second upgrade. I think it is a separate issue though and need not be handled in this PR.

[silvadomi]

Not sure why the test is failing, but I don't think it has to do with this patch. Seems to be related to item descriptions:

(~[slow] ~[.],starting_items)=> ../tests/iteminfo_test.cpp:1304: FAILED:
(~[slow] ~[.],starting_items)=>   CHECK( item_info_str( hazmat, protection ) == "--\n" "<color_c_white>Protection for</color>: The <color_c_cyan>arms</color>. The <color_c_cyan>eyes</color>. The <color_c_cyan>feet</color>. The <color_c_cyan>hands</color>. The <color_c_cyan>head</color>. The <color_c_cyan>legs</color>. The <color_c_cyan>mouth</color>. The <color_c_cyan>torso</color>.\n" "<color_c_white>Coverage</color>: <color_c_light_blue>Outer</color>.\n" "  Default:  <color_c_yellow>100</color>\n" "<color_c_white>Protection</color>:\n" "  Bash: <color_c_yellow>4.00</color>\n" "  Cut: <color_c_yellow>4.00</color>\n" "  Ballistic: <color_c_yellow>2.00</color>\n" "  Pierce: <color_c_yellow>3.20</color>\n" "  Acid: <color_c_yellow>9.00</color>\n" "  Fire: <color_c_yellow>1.00</color>\n" "  Environmental: <color_c_yellow>20</color>\n" )
(~[slow] ~[.],starting_items)=> with expansion:
Error: (~[slow] ~[.],starting_items)=>   "--

...

(~[slow] ~[.],starting_items)=> ../tests/iteminfo_test.cpp:1328: FAILED:
(~[slow] ~[.],starting_items)=>   CHECK( item_info_str( zentai, protection ) == "--\n" "<color_c_white>Protection for</color>: The <color_c_cyan>arms</color>. The <color_c_cyan>eyes</color>. The <color_c_cyan>feet</color>. The <color_c_cyan>hands</color>. The <color_c_cyan>head</color>. The <color_c_cyan>legs</color>. The <color_c_cyan>mouth</color>. The <color_c_cyan>torso</color>.\n" "<color_c_white>Coverage</color>: <color_c_light_blue>Close to skin</color>.\n" "  Default:  <color_c_yellow>100</color>\n" "<color_c_white>Protection</color>:\n" "  Bash: <color_c_yellow>2.00</color>\n" "  Cut: <color_c_yellow>2.00</color>\n" "  Ballistic: <color_c_yellow>2.00</color>\n" "  Pierce: <color_c_yellow>50.00</color>\n" "  Acid: <color_c_yellow>9.00</color>\n" "  Fire: <color_c_yellow>2.00</color>\n" "  Environmental: <color_c_yellow>10</color>\n" )
(~[slow] ~[.],starting_items)=> with expansion:
Error: (~[slow] ~[.],starting_items)=>   "--

[Maleclypse]

Very cool! Thank you for your work!