chore(git): improve Ionitron to stop closing issues that have the 'needs: investigation' label (#30424)

Issue number: internal

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## What is the current behavior?
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- Currently, `Ionitron` is closing issues when they have the `needs:
investigation` label.
- We might want to use the duplicate ticket as our source of truth since
a community member has made a
[suggestion](#30380 (comment))
that could fix it.

## What is the new behavior?
<!-- Please describe the behavior or changes that are being added by
this PR. -->
- The `ionic-issue-bot.yml` file was changed to stop closing issues that
have the `needs: investigation` label
- To prevent `Ionitron` from closing issues with the `needs:
investigation` label, we've added this label to the `exemptLabels` list
under the `stale`, `noReply`, and `noReproduction` sections.
- This tells the bot not to close issues with that label, even if they
meet the criteria for being stale or lacking a reply/reproduction.


## Does this introduce a breaking change?

- [ ] Yes
- [X] No

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## Other information

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screenshots of how the component looks before and after the change. -->
- _N.A._

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Co-authored-by: Brandy Smith <[email protected]>

Author: gnbm

.github/ionic-issue-bot.yml

@@ -93,6 +93,7 @@ stale:
     - "triage"
     - "type: bug"
     - "type: feature request"
+    - "needs: investigation"
   exemptAssigned: true
   exemptProjects: true
   exemptMilestones: true