RFR: 1851: Fold CSR bot into PR bot [v3]

[Zhao Song]

On Tue, 28 Mar 2023 22:15:03 GMT, Erik Joelsson <erikj at openjdk.org> wrote:

>> Zhao Song has updated the pull request incrementally with four additional commits since the last revision:
>> 
>>  - fix a problem
>>  - fix a problem
>>  - renamed some classes
>>  - improve PullRequestBotFactoryTest
>
> bots/pr/src/test/java/org/openjdk/skara/bots/pr/CSRCommandTests.java line 453:
> 
>> 451: 
>> 452:             // The bot should reply with a message that there is already an approved CSR request
>> 453:             // Now CheckWorkItem is responsible for updating CSR label, so before '/csr' is handled, csr label is added to this pr
> 
> We should avoid comments that reference a change in the code. After this PR is integrated, it's no longer relevant that this functionality moved to CheckWorkItem.

Got it. Will change it

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PR Review Comment: https://git.openjdk.org/skara/pull/1492#discussion_r1151209779