feat(compiler): support deployment parameters in templates

[jbrockopp]

closes go-vela/community#568

Related to go-vela/docs#306

This change updates the golangci-lint configuration to ignore the wsl linter for *_test.go files.

This change also adds support for referencing DEPLOYMENT_PARAMETER_* variables in a template.

In a Go template, you'll be able to reference these parameters using the existing vela platform function:

• {{ vela "DEPLOYMENT_PARAMETER_<NAME>" }}

In a Starlark template, you'll be able to reference these parameters using the existing vela platform function:

• ctx["vela"]["deployment"]["<name>"]

This was tested utilizing the following deployment command:

$ vela add deployment --org <org> --repo <repo> --parameter 'foobar=3.14'

And using the following root Vela pipeline:

version: "1"

templates:
  - name: go
    source: git.example.com/<org>/<repo>/template/test.yml
    format: go
    type: github

  - name: starlark
    source: git.example.com/<org>/<repo>/template/test.star
    format: starlark
    type: github

steps:
  - name: go
    template:
      name: go

  - name: starlark
    template:
      name: starlark

The test.yml file had the following content:

metadata:
  template: true

steps:
  - name: hello
    image: alpine:latest
    commands:
      - echo hello

  - name: deployment
    image: alpine:latest
    ruleset:
      event: deployment
    commands:
      - echo $DEPLOYMENT_PARAMETER_FOOBAR
      - echo {{ vela "DEPLOYMENT_PARAMETER_FOOBAR" }}

The test.star file had the following content:

def main(ctx):
  return {
    'version': '1',
    'steps': [
      {
        'name': 'hello',
        'image': 'alpine:latest',
        'commands': [
          'echo hello',
        ]
      },
      {
        'name': 'deployment',
        'image': 'alpine:latest',
        'ruleset': {
          'event': ['deployment'],
        },
        'commands': [
          'echo $DEPLOYMENT_PARAMETER_FOOBAR',
          "echo %s" % ctx["vela"]["deployment"]["foobar"],
        ]
      },
    ],
  }

[codecov]

Codecov Report

Merging #665 (a3f4495) into master (a08413f) will increase coverage by 0.05%.
The diff coverage is 72.72%.

@@            Coverage Diff             @@
##           master     #665      +/-   ##
==========================================
+ Coverage   55.14%   55.20%   +0.05%     
==========================================
  Files         201      201              
  Lines       15882    15916      +34     
==========================================
+ Hits         8758     8786      +28     
- Misses       6748     6752       +4     
- Partials      376      378       +2     

Impacted Files	Coverage Δ
compiler/template/starlark/convert.go	54.65% <57.14%> (+3.18%)	⬆️
compiler/template/native/convert.go	90.69% <100.00%> (+5.51%)	⬆️

[kneal]

LGTM 🐬