Rename linux.memory.* metrics and attributes to memory.linux.*

[rogercoll]

Area(s)

area:system

Is your change request related to a problem? Please describe.

The root namespace should contain the overall category the name belongs to. The important category in these schemas is memory, the linux namespace just gives additional contextual information.

Reference #1364 (comment)

Describe the solution you'd like

Attributes

• linux.memory.slab.state -> memory.linux.slab.state

Metrics

• system.linux.memory.available -> system.memory.linux.available
• system.linux.memory.slab.usage -> system.memory.linux.slab.usage

Describe alternatives you've considered

No response

Additional context

No response