refactor: pull go-vela packages from server and worker

[jbrockopp]

Related to https://github.com/go-vela/community/blob/master/proposals/2021/08-25_repo-structure.md

Leftover work from go-vela/community#394 and go-vela/community#395

NOTE: Most of the added LOC in this change is in the go.sum file.

Compiler

This removes the dependency on the compiler package code from the https://github.com/go-vela/compiler repo.

The link to this package is https://github.com/go-vela/compiler/tree/master/compiler.

Instead, we'll now vendor the compiler package code from the https://github.com/go-vela/server repo.

The link to this package is https://github.com/go-vela/server/tree/master/compiler.

Executor

This removes the dependency on the executor package code from the https://github.com/go-vela/pkg-executor repo.

The link to this package is https://github.com/go-vela/pkg-executor/tree/master/executor.

Instead, we'll now vendor the executor package code from the https://github.com/go-vela/worker repo.

The link to this package is https://github.com/go-vela/worker/tree/master/executor.

Mock

This removes the dependency on the server package code from the https://github.com/go-vela/mock repo.

The link to this package is https://github.com/go-vela/mock/tree/master/server.

Instead, we'll now vendor the mock/server package code from the https://github.com/go-vela/server repo.

The link to this package is https://github.com/go-vela/server/tree/master/mock/server.

Runtime

This removes the dependency on the runtime package code from the https://github.com/go-vela/pkg-runtime repo.

The link to this package is https://github.com/go-vela/pkg-runtime/tree/master/runtime.

Instead, we'll now vendor the runtime package code from the https://github.com/go-vela/worker repo.

The link to this package is https://github.com/go-vela/worker/tree/master/runtime.

[codecov]

Codecov Report

Merging #303 (0aa3e90) into master (d1721df) will not change coverage.
The diff coverage is 50.00%.

@@           Coverage Diff           @@
##           master     #303   +/-   ##
=======================================
  Coverage   86.84%   86.84%           
=======================================
  Files         115      115           
  Lines        5139     5139           
=======================================
  Hits         4463     4463           
  Misses        554      554           
  Partials      122      122           

Impacted Files	Coverage Δ
action/pipeline/exec.go	0.00% <0.00%> (ø)
command/pipeline/exec.go	0.00% <ø> (ø)
command/pipeline/validate.go	72.09% <ø> (ø)
action/pipeline/validate.go	86.88% <100.00%> (ø)