add custom easyblock for CRISPR-DAV

[deniskristak]

needed to create easyblock due to complex source file changes

[verdurin]

@deniskristak I tried building the associated easyconfig and saw this error:

eb --from-pr=13139 --robot --debug --upload-test-report --include-easyblocks-from-pr 2487
== Temporary log file in case of crash /tmp/eb-jdvm00ah/easybuild-q0xclof4.log
== easyblock crispr_dav.py included from PR #2487
ERROR: Failed to process easyconfig /tmp/eb-jdvm00ah/files_pr13139/c/crispr-dav/crispr-dav-2.3.4-foss-2020b.eb: Failed to obtain class for EB_crisprdav easyblock (not available?): No module named 'easybuild.easyblocks.crisprdav'

[deniskristak]

@verdurin correct, i forgot to remove an easyconfig with an the old name. Should be working now

[boegel]

close/re-open to wake up GitHub Actions...