Codepipeline cdk v2: Self mutate before synth step

[purnasrivatsa96]

Describe the bug

i believe self mutate runs (if we set self Mutation to true in new CodePipeline(...) initialization) after synth step. What if i change commands in synth . Then i need self mutate to run first so that synth takes the latest codeBuildproject( with updated synth commands).
Proposed Solution -
selfMutateFirst? : boolean

Regression Issue

• Select this option if this issue appears to be a regression.

Last Known Working CDK Version

No response

Expected Behavior

A field to configure running self mutate before synth.

Current Behavior

No option to configure running self mutate before synth.

Reproduction Steps

const pipeline = new CodePipeline(this, "Pipeline", {
  pipelineName: "TestPipeline",
  selfMutation: true,
  synth: new ShellStep("Synth", {

.
.
.
.
}

Possible Solution

A field in new CodePipeline() init -
selfMutateFirst? : boolean

Additional Information/Context

No response

CDK CLI Version

2.165.0 (build 00f70f1)

Framework Version

No response

Node.js Version

v18.20.4

OS

Darwin MacOS

Language

TypeScript

Language Version

No response

Other information

No response

[pahud]

close in favor of #32627

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