Chore: Detaching go tools from the main Grafana workspace (#104861)

* add script for tooling

* add to make

* not to forget

* reworked go tools

* add tool installation script

* adding readme

* updating readme

* updating readme

* cleanup install.sh and makefile

* update the readme file

* cleanup scripts

* switch variables.mk to lazy evaluation

* add tools ache to gitignore

* get rid of absolute path in hte Variables.mk file

* switch to reusable function for path generation

* add debug statements

* add create cache tool dir

* add debuig statements to make file

* drop tool cache

* fix race condition n ci

* fix race condition n ci

* cleanup workspace

* add lefthook.rc to codeowners

* copy .citools folder to docker image

* switch back to main branch of grafana-build

* Add .citools to the drone builder

* fix wording in generate.sh and README.md

Dockerfile

@@ -60,13 +60,7 @@ WORKDIR /tmp/grafana
 
 COPY go.* ./
 COPY .bingo .bingo
-COPY .citools/bra .citools/bra
-COPY .citools/cue .citools/cue
-COPY .citools/cog .citools/cog
-COPY .citools/lefthook .citools/lefthook
-COPY .citools/jb .citools/jb
-COPY .citools/golangci-lint .citools/golangci-lint
-COPY .citools/swagger .citools/swagger
+COPY .citools .citools
 
 # Include vendored dependencies
 COPY pkg/util/xorm pkg/util/xorm