Added support for Amazon Linux distribution in post remove scripts

[chebrolus]

Required for all PRs:

• CHANGELOG.md updated
• Sign CLA (if not already signed)
• README.md updated (if adding a new plugin)

[sparrc]

I'm not sure that you've handed all cases here. What if the script is called in "upgrade" mode on amazon linux? Why are you not detecting that? (see relevant if-statements for debian and rpm)

[chebrolus]

Thanks for review and feedback @sparrc
Let me check Amazon equivalent for this check and put in so that only triggered in case of post package remove.

[chebrolus]

@sparrc - Please review the update and share feedback. Sorry I had to force push as I ran into issue with rebase from upstream.

Instead of going by the Linux distribution based conditional branching this revised script handle remove based on what packaging guidelines these distributions follow.
Looks like you have similar issue with InfluxDB too, if this is acceptable solution you can follow similar approach for InfluxDB as well.

[sparrc]

thnaks @schebrolu

[sparrc]

@schebrolu can you rebase your changes and re-push. Force pushing is totally fine, by the way.

[chebrolus]

Thank you @sparrc
Rebased and pushed my changes, please review and merge.

[sparrc]

thanks @schebrolu

[chebrolus]

No merge :(

[sparrc]

oops! my mistake