fix(actions): keep github.event.inputs as strings for workflow_dispatch (#38899) (#38908)

Backport #38899 

`github.event.inputs` must mirror the raw `workflow_dispatch` payload,
where
GitHub keeps every input as a string. Only the separate `inputs` context
preserves declared types, e.g. booleans. A previous fix coerced boolean
inputs in the single map that fed both contexts, so
`github.event.inputs.someBool` became a real boolean and comparisons
like
`== 'true'` stopped matching.

`github.event.inputs` now stays string-only again. The `inputs` context
used
for server-side `if:` evaluation of needs-gated/matrix-deferred jobs
re-coerces booleans independently, from the job's own workflow
declaration,
so that path keeps working correctly.

Fixes https://github.com/go-gitea/gitea/issues/38896

modules/actions/jobparser/model.go

@@ -8,6 +8,8 @@ import (
 	"errors"
 	"fmt"
 
+	"gitea.dev/modules/util"
+
 	"gitea.com/gitea/runner/act/model"
 	"go.yaml.in/yaml/v4"
 )
@@ -31,6 +33,11 @@ func (w *SingleWorkflow) Job() (string, *Job) {
 	return "", nil
 }
 
+// WorkflowDispatchConfig returns the `on: workflow_dispatch` declaration, nil if there is none.
+func (w *SingleWorkflow) WorkflowDispatchConfig() *model.WorkflowDispatch {
+	return (&model.Workflow{RawOn: w.RawOn}).WorkflowDispatchConfig()
+}
+
 func (w *SingleWorkflow) jobs() ([]string, []*Job, error) {
 	ids, jobs, err := parseMappingNode[*Job](&w.RawJobs)
 	if err != nil {
@@ -291,7 +298,7 @@ func EvaluateConcurrency(rc *model.RawConcurrency, jobID string, job *Job, gitCt
 	if evaluated.RawExpression != "" {
 		return evaluated.RawExpression, false, nil
 	}
-	return evaluated.Group, evaluated.CancelInProgress == "true", nil
+	return evaluated.Group, util.ParseYamlBool(evaluated.CancelInProgress), nil
 }
 
 func toGitContext(input map[string]any) *model.GithubContext {