* chore: experiment with using a tmp file for getting collector logs in simulator
* chore: collector simulator: cleaned up tmp file based collector logs capture
* chore: add test validating regex proc doesn't error for logs that dont match
* chore: return collector error logs from pipeline preview API
* chore: add test validating regex processor doesn't log errors for mismatched logs
* chore: add if condition for generated regex processors
* chore: add test case validating json parser ignore non json logs
* chore: add if condition for operator generated for json parser
* chore: add test case validating move processor ignores logs with missing field
* chore: add if condition for operator generated for move
* chore: add test case validating copy processor ignores logs with missing field
* chore: add if condition for operator generated for copy
* chore: add test case validating remove processor ignores logs with missing field
* chore: add if condition for operator generated for remove
* chore: log pipelines: ensuring json parser ignores log if json field is missing
* chore: log pipelines: ensure regex parser ignores log if field is missing
* chore: add test for previewing pipeline with grok parser
* chore: import grok parser in logparsing preview to ensure its a registered logtransform op
* chore: add dependencies for grok parsing operator
* chore: rename model.GetLogsResponse -> model.SignozLog for use in both requests and responses
* feat: add test for simulating log pipelines processing
* feat: get pipeline preview tests passing
* chore: cleanup
