chore: Switch license declarations to SPDX

[jsync-swirlds]

Change all license declarations to SPDX format and change spotless configuration to require the same.

[andrewb1269hg]

Approve the Devops-CI assigned files.

[AlfredoG87]

LGTM

[mattp-swirldslabs]

Looks good

[ata-nas]

Looks good! As a side effect, we have also had the chance to run spotless on all files now with palantir, which is nice, some code was formatted to match that.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.78%. Comparing base (287adeb) to head (9089a76).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##               main     #447   +/-   ##
=========================================
  Coverage     96.77%   96.78%           
  Complexity      409      409           
=========================================
  Files            82       82           
  Lines          1458     1460    +2     
  Branches         90       90           
=========================================
+ Hits           1411     1413    +2     
  Misses           34       34           
  Partials         13       13           

Files with missing lines	Coverage Δ
...java/com/hedera/block/common/utils/ChunkUtils.java	100.00% <ø> (ø)
...a/com/hedera/block/common/utils/FileUtilities.java	100.00% <ø> (ø)
...a/com/hedera/block/common/utils/MathUtilities.java	100.00% <ø> (ø)
...a/com/hedera/block/common/utils/Preconditions.java	100.00% <ø> (ø)
...com/hedera/block/common/utils/StringUtilities.java	100.00% <ø> (ø)
...ain/java/com/hedera/block/server/BlockNodeApp.java	100.00% <ø> (ø)
...dera/block/server/BlockNodeAppInjectionModule.java	100.00% <ø> (ø)
...ain/java/com/hedera/block/server/ServerConfig.java	100.00% <ø> (ø)
.../block/server/config/BlockNodeConfigExtension.java	100.00% <ø> (ø)
...m/hedera/block/server/config/BlockNodeContext.java	100.00% <100.00%> (ø)
... and 72 more