fix: do not generate cert/pass when set via envionment

[bitdisaster]

No description provided.

[github-actions]

Unit Tests Coverage Report

Coverage after merging respect-win-sign-environment-variables into master will be

100.00%

Coverage Report

File	Stmts	Branches	Funcs	Lines	Uncovered Lines
src
bin.ts	100%	100%	100%	100%
cert.ts	100%	100%	100%	100%
manifestation.ts	100%	100%	100%	100%
powershell.ts	100%	100%	100%	100%
utils.ts	99.74%	99.49%	100%	100%	156
win-version.ts	100%	100%	100%	100%

[github-actions]

E2E Tests Coverage Report

Coverage after merging respect-win-sign-environment-variables into master will be

97.32%

Coverage Report

File	Stmts	Branches	Funcs	Lines	Uncovered Lines
src
bin.ts	93.83%	85.71%	90.91%	96.43%	27, 50–52
cert.ts	100%	100%	100%	100%
index.ts	100%	100%	100%	100%
manifestation.ts	92.77%	85.71%	100%	97.78%	35, 40, 45, 55, 80–81
utils.ts	90.81%	84.62%	100%	97.14%	104–105, 105, 108, 121, 138–139, 159, 161–162, 175, 181, 186, 188, 214, 217, 225, 249, 28–31, 36, 46, 76, 78, 81–82, 85, 92–96, 96