Name code generators after their generated artifacts

[stephanos]

What changed?

Rename internal generators to describe their generated artifacts and update build commands, directives, templates, and generated headers, with small lint fixes for the relocated tools.

Before	After
genrpcwrappers	genrpcclientwrappers
genroutingkeyextractor	genrpcroutingkeyextractor
genrpcserverinterceptors	genrpclogtagextractors
gendynamicconfig	gendynamicconfigsettings
gensearchattributehelpers	gensearchattributeeventaccessors
protogen	genserverprotos
getproto	exportapidescriptors

The new validation generator is renamed from genrpcvalidationinterceptor to genrpcvalidationdispatch in #12364.

Why?

Consistent names make each tool’s output clear and distinguish the local Server generator from upstream protogen.

How did you test it?

• built
• run locally and tested manually
• covered by existing tests
• added new unit test(s)
• added new functional test(s)

Regeneration preserves all 22 generated Go bodies; descriptor export, generator and affected package tests (-tags test_dep), and make lint-code-fast pass.

Potential risks

External scripts invoking the renamed tool paths must update their commands.