sp_BlitzWho - don't fail if login doesn't have SELECT permission on msdb.dbo.sysjobs

[VladDBA]

Is your feature request related to a problem? Please describe.
If executed by a login that doesn't have SELECT permissions on msdb.dbo.sysjobs sp_BlitzWho will end up erroring out with:

The SELECT permission was denied on the object 'sysjobs', database 'msdb', schema 'dbo'.

Describe the solution you'd like
Add a check for SELECT permissions on msdb.dbo.sysjobs and use that flag similarly to how @Platform is used to decide if the the msdb.dbo.sysjobs portion should be added to the dynamic T-SQL.

The minimum permissions required to run sp_BlitzWho are now:

• VIEW SERVER PERFORMANCE STATE
• EXECUTE ON sp_BlitzWho

The only downside when running sp_BlitzWho without SELECT permission on msdb.dbo.sysjobs is that the program_name column will contain the job id instead of its name for sessions originating from SQL Server Agent.

Describe alternatives you've considered
Not backporting fixes I've made for PSBlitz, but that doesn't feel right/fair.

Are you ready to build the code for the feature?
Yup, PR incoming as soon as I file this issue.

[BrentOzar]

Thanks for the pull request! Looks good, merging into the dev branch, will be in the next release with credit to you in the release notes.