Use run-name and evaluate workflow variables

[badhezi]

This addresses #34247
depends on https://gitea.com/gitea/act/pulls/136

I couldn't find any previous implementation for run-name support on workflows so I created one.

Key points:
All dispatched workflows, scheduled workflows and detected workflows (from different hooks) will use and evaluate run-name if exists, with the corresponding gitea context and variables. This will be used as the Action run title and replace the default commit message being used today.

Had to change act package jobparser (see link above)
and create two helpers

gitea/models/actions/utils.go

Line 86 in 3a1320c

func (s *ActionSchedule) ToActionRun() *ActionRun {

and

gitea/services/actions/context.go

Line 169 in 3a1320c

func (g *GiteaContext) ToGitHubContext() *model.GithubContext {

to pass the correct types to GenerateGiteaContext and WithGitContext respectively.

[TheFox0x7]

Shouldn't this go to jobparser?

[badhezi]

@TheFox0x7
Created https://gitea.com/gitea/act/pulls/136 to move most of the logic to jobparser