chore(repo): use parallelism on assignment rules (#30196)

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## Current Behavior
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Currently we set the parallelism at the DTE level and it applies to all
tasks executed for that DTE.

## Expected Behavior
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-->

We can set parallelism on our assignment rules and dynamically set the
parallelism of tasks as they are being scheduled.

## Related Issue(s)
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merged. -->

Fixes #

.github/workflows/ci.yml

@@ -85,7 +85,7 @@ jobs:
           pnpm nx run-many -t check-imports check-commit check-lock-files check-codeowners --parallel=1 --no-dte &
           pids+=($!)
 
-          pnpm nx affected --targets=lint,test,build,e2e,e2e-ci --base=$NX_BASE --head=$NX_HEAD --parallel=3 &
+          pnpm nx affected --targets=lint,test,build,e2e,e2e-ci --base=$NX_BASE --head=$NX_HEAD &
           pids+=($!)
 
           for pid in "${pids[@]}"; do

.nx/workflows/dynamic-changesets.yaml

@@ -7,8 +7,16 @@ assignment-rules:
       - build*
     run-on:
       - agent: linux-extra-large
+        parallelism: 1
+
+  - targets:
+      - lint
+    run-on:
+      - agent: linux-medium
+        parallelism: 6
 
   - targets:
       - '*'
     run-on:
       - agent: linux-medium
+        parallelism: 3