Safer queries (and update validators)

[cretz]

Is your feature request related to a problem? Please describe.

Queries can start activities and such and they shouldn't

Describe the solution you'd like

• Allow query handlers to accept a context as the first parameter in a backwards compatible way
• Disallow that context to be used for execute activity
• Add workflowcheck static analyzer check to ensure query handlers do not do anything they aren't supposed to

This is obviously a non-trivial amount of work and low priority

[Quinn-With-Two-Ns]

This same restrictions should also apply to SideEffects as well

[Quinn-With-Two-Ns]

see also https://github.com/temporalio/sdk-features/issues/177

[Quinn-With-Two-Ns]

Queries, and other read only contexts can no longer perform any mutating operations. Leaving this open because we could still add support for the static analyzer