Merge branch 'subexpression_insertion' into 'master'

Advanced Subexpression Insertion

See merge request pycodegen/pystencils!258
13 jobs for master in 19 minutes and 36 seconds (queued for 1 second)
Name Stage Failure
failed
arm64v9 Test
Uploading artifacts as "archive" to coordinator... ok  id=618156 responseStatus=201 Created token=wZy6Rsfg
Uploading artifacts...
WARNING: coverage.xml: no matching files
ERROR: No files to upload
Uploading artifacts...
report.xml: found 1 matching files and directories

Uploading artifacts as "junit" to coordinator... ok
id=618156 responseStatus=201 Created token=wZy6Rsfg
Cleaning up file based variables
ERROR: Job failed: exit code 1