build: speed up linux CI even more (#20241)
build: speed up linux CI even more (#20241)

* build: yolo a theoretical speed improvement

* chore: persist src/electron and friends for testing purposes

* build: do not generate dist.zip on debug builds

* chore: ensure licenses and version file exist for zip-symbols script

bpasero/electron,electron/electron,bpasero/electron,electron/electron,seanchas116/electron,bpasero/electron,seanchas116/electron,bpasero/electron,seanchas116/electron,electron/electron,bpasero/electron,gerhardberger/electron,electron/electron,gerhardberger/electron,gerhardberger/electron,seanchas116/electron,electron/electron,seanchas116/electron,gerhardberger/electron,seanchas116/electron,bpasero/electron,gerhardberger/electron,electron/electron,electron/electron,gerhardberger/electron,bpasero/electron,gerhardberger/electron