Added signal handling in SidecarLog results

In the native Kubernetes sidecar model, sidecars are implemented as init
containers with a `RestartPolicy: Always`, which means they run for the entire
duration of the pod's lifecycle. However, the current Tekton sidecar log results
implementation doesn't account for this behavior and exits after processing
results, causing the container to restart repeatedly.

Signed-off-by: Priti Desai <[email protected]>

GHA label checker

Free up space on the workers before running CI
as disk full is causing CI to fail and blocking PRs.

Signed-off-by: Andrea Frittoli <[email protected]>

fix: allow finalizer updates on completed TaskRuns

Similar to issue #8824 for PipelineRuns, the webhook was denying
finalizer updates on completed TaskRuns. The validation webhook was
blocking all updates when TaskRun.IsDone() returned true, preventing
tools like Tekton Chains from clearing finalizers.

To ensure we don't have old obj default drift, we are adding
a fast path check for spec equality and are normalizing the old spec
with current defaults before comparison. Then we allow updates when
only finalizers differ and reject spec changes.

This mirrors the fix applied to PipelineRun validation.

Refactor CreatePVCFromVolumClaimTemplate condition logic

Co-authored-by: Stanislav Jakuschevskij <[email protected]>

Fix tini-git image to be multi-arch

The previous image was built for amd64 only, which makes any image
using it as base image (such as the resolvers one) also only
targeting amd64.

Signed-off-by: Vincent Demeester <[email protected]>

nightly release with gh actions

test: extract common status helper functions

Create `pkg/reconciler/testing/status.go` and move status related
helper functions for `TaskRun/CustomRun` and later `PipelineRun` there.
Remove duplication from helper functions.

Move yaml parsing helper functions to `test/parse/yaml.go`.

Rename import `ttesting ==> th`, short for "testing helpers".

Issue #8760, #7166.

Signed-off-by: Stanislav Jakuschevskij <[email protected]>

refactor: use os.UserHomeDir instead of go-homedir

Let's use the built-in Go function instead of the library. It makes
go-homedir an indirect dependency as it is still in-use by transitive
dependency.

Signed-off-by: Vincent Demeester <[email protected]>

feat: promote StepActions to GA

Upgrade StepActions feature from beta to stable to make sure that it is enabled by default.
StepActions has been in beta for a while and is also has good adoption among the community.
It is pretty stable as a feature based on the regular usage. Moving it to GA will make sure
that users will have access to better pipeline composability from the get-go.
The following changes were made:
- set enable-step-actions to "true" by default
- updated to reflect that StepActions are now enabled by default
- changed the feature flag stability from BetaAPIFields to StableAPIFields in feature_flags.go
- updated feature flags, e2e tests and test data
- moved relevant examples to stable examples
- added relevant documentation for the move from beta to stable
- make enable-step-actions into no-op feature flag.

This change makes StepActions a stable, first-class feature in Tekton Pipelines.

fix: avoid panic when validate enum param with special matrix task

fix #8464

If the matrix Task has no TaskRun to execute, the `ResolvedTask` will be
nil, we should skip the validation.