Rollup merge of #138307 - Kobzol:citool-alias, r=marcoieni

Allow specifying glob patterns for try jobs

This PR modifies the `try-job` lookup logic to allow glob patterns. So you can e.g. request all MSVC-related jobs with `try-job: *msvc*`.

Best reviewed commit by commit.

r? ``````@marcoieni``````

try-job: `*msvc*`

src/tests/ci.md

@@ -133,29 +133,37 @@ There are several use-cases for try builds:
   Again, a working compiler build is needed for this, which can be produced by
   the [dist-x86_64-linux] CI job.
 - Run a specific CI job (e.g. Windows tests) on a PR, to quickly test if it
-  passes the test suite executed by that job. You can select which CI jobs will
+  passes the test suite executed by that job.
-  be executed in the try build by adding up to 10 lines containing `try-job:
+
-  <name of job>` to the PR description. All such specified jobs will be executed
+You can select which CI jobs will
-  in the try build once the `@bors try` command is used on the PR. If no try
+be executed in the try build by adding lines containing `try-job:
-  jobs are specified in this way, the jobs defined in the `try` section of
+<job pattern>` to the PR description. All such specified jobs will be executed
-  [`jobs.yml`] will be executed by default.
+in the try build once the `@bors try` command is used on the PR. If no try
+jobs are specified in this way, the jobs defined in the `try` section of
+[`jobs.yml`] will be executed by default.
+
+Each pattern can either be an exact name of a job or a glob pattern that matches multiple jobs,
+for example `*msvc*` or `*-alt`. You can start at most 20 jobs in a single try build. When using
+glob patterns, you might want to wrap them in backticks (`` ` ``) to avoid GitHub rendering
+the pattern as Markdown.
 
 > **Using `try-job` PR description directives**
 >
-> 1. Identify which set of try-jobs (max 10) you would like to exercise. You can
+> 1. Identify which set of try-jobs you would like to exercise. You can
 >    find the name of the CI jobs in [`jobs.yml`].
 >
-> 2. Amend PR description to include (usually at the end of the PR description)
+> 2. Amend PR description to include a set of patterns (usually at the end
->    e.g.
+>    of the PR description), for example:
 >
 >    ```text
 >    This PR fixes #123456.
 >
 >    try-job: x86_64-msvc
 >    try-job: test-various
+>    try-job: `*-alt`
 >    ```
 >
->    Each `try-job` directive must be on its own line.
+>    Each `try-job` pattern must be on its own line.
 >
 > 3. Run the prescribed try jobs with `@bors try`. As aforementioned, this
 >    requires the user to either (1) have `try` permissions or (2) be delegated