Kernel Timing Update (#4806)

* Added Ckwriter to write Timing Offset to Comments (#4720)

* ckwriter adds timing offset to kernel's comments.

* account for timing padding.

* kerneldbgen adds timing offset if found in comments.

* Added documentation.

* Updated ckwriter offset calculations and added spkwriter calculations (#4722)

* Corrected time offset calculations in ckwriter. Added time offset calculations to spkwriter. Added end time offsets.

* Fixed padding checks.

* Fixes ckwriter and spkwriter test failures. (#4726)

* Kerneldb changes for spice kernel timing (#4728)

* Added checks for instruments and spice kernel timing offsets

* Addressed PR feedback

* Addressed PR feedback

* Removed extra whitespace

* Kernel Timing Tests (#4729)

* Added tests for ckwriter and spkwriter. Converted kerneldbgen tests to GTests and added tests.

* Small updates

* Fixes mex module timeout errors.

* Removed large kernel files from ck tests.

* KernelDB Tests (#4807)

* Added tests for ckwriter and spkwriter. Converted kerneldbgen tests to GTests and added tests.

* Removed large kernel files from ck tests.

* KernelDB test.

* Added comments and use sc clock count for offset

* Reverted logic back to start/stop time

* Fixed syntax errors

* Added local sclks

* Modified sclk path to point to local data area

Co-authored-by: Amy Stamile <74275278+amystamile-usgs@users.noreply.github.com>
Co-authored-by: AustinSanders <arsanders@usgs.gov>
Co-authored-by: Austin Sanders <austinsanders1993@gmail.com>