Add firstExecutionRunId to system search attribute

[longquanzheng]

Is your feature request related to a problem? Please describe.
Right now runId is always changed when :

• ContinueAsNew
• Reset
• Cron
• WorkflowRetry

However, user have to rely on runId to distinguish different executions when using IdReusePolicy. For example, user starts two different runs with IdReusePolicy, and they are both completed after certain reset or continueAsNew.

Now user wants to query the final workflow results for different runs.

Describe the solution you'd like
User can provide the firstExecutionRunId to find out the last runId (filter by completed or running status) to find out the last runId. And then use the final runId to query the workflows

Describe alternatives you've considered
User can do search attribute themselves, but it's repeated work.

Additional context
NA

[alexshtin]

Similar issue: #351