Switch references to master to main in the codebase + validating infra post-main migration

[orta]

This PR is so I can run some of the checking infra without affecting existing PRs. - #44323

But it does actually solve a real problem, so I'm going to ask someone to review it

[orta]

@typescript-bot test this
@typescript-bot run dt
@typescript-bot user test this
@typescript-bot pack this

[typescript-bot]

Heya @orta, I've started to run the tarball bundle task on this PR at f1f6043. You can monitor the build here.

[typescript-bot]

Heya @orta, I've started to run the parallelized Definitely Typed test suite on this PR at f1f6043. You can monitor the build here.

[typescript-bot]

Heya @orta, I've started to run the extended test suite on this PR at f1f6043. You can monitor the build here.

[typescript-bot]

Heya @orta, I've started to run the parallelized community code test suite on this PR at f1f6043. You can monitor the build here.

[typescript-bot]

Hey @orta, something went wrong when looking for the build artifact. (You can check the log here).

[orta]

maybe I was being too clever with the changeI made I've created a legit change

@typescript-bot test this
@typescript-bot run dt
@typescript-bot user test this
@typescript-bot pack this

[typescript-bot]

Heya @orta, I've started to run the tarball bundle task on this PR at 9230a98. You can monitor the build here.

[typescript-bot]

Heya @orta, I've started to run the parallelized community code test suite on this PR at 9230a98. You can monitor the build here.

[typescript-bot]

Heya @orta, I've started to run the extended test suite on this PR at 9230a98. You can monitor the build here.

[typescript-bot]

Heya @orta, I've started to run the parallelized Definitely Typed test suite on this PR at 9230a98. You can monitor the build here.

[typescript-bot]

Hey @orta, I've packed this into an installable tgz. You can install it for testing by referencing it in your package.json like so:

{
    "devDependencies": {
        "typescript": "https://typescript.visualstudio.com/cf7ac146-d525-443c-b23c-0d58337efebc/_apis/build/builds/104380/artifacts?artifactName=tgz&fileId=FC71E08017109FF167A4F288671DF6A7630D08D2DBB929DAE6255D1D95159A8D02&fileName=/typescript-4.4.0-insiders.20210531.tgz"
    }
}

and then running npm install.

---

There is also a playground for this build and an npm module you can use via "typescript": "npm:@typescript-deploys/[email protected]".;

[typescript-bot]

The user suite test run you requested has finished and failed. I've opened a PR with the baseline diff from master.

[orta]

OK, that should get GH Actions running on any PRs shipping new commits.