fix: use proxy env variables and abort-controller package to prevent hanging behind proxies

[tatomyr]

What/Why/How?

While working behind proxy, HTTP_PROXY or HTTPS_PROXY environment variables might be used to detect this and skip unnecessary http calls.
Also, added abort-controller package to ensure consistent usage throughout different nodeJS versions.

Reference

Related to #1146

Testing

IN PROGRESS. Trying to replicate the original issue...

Screenshots (optional)

Check yourself

• Code is linted
• Tested with redoc/reference-docs/workflows
• All new/updated code is covered with tests

Security

• Security impact of change has been considered
• Code follows company security practices and guidelines

[github-actions]

Command	Mean [s]	Min [s]	Max [s]	Relative
REDOCLY_TELEMETRY=off redocly lint packages/core/src/benchmark/benches/rebilly.yaml	1.441 ± 0.034	1.401	1.494	1.00
REDOCLY_TELEMETRY=off redocly-next lint packages/core/src/benchmark/benches/rebilly.yaml	1.465 ± 0.040	1.429	1.538	1.02 ± 0.04

[github-actions]

Coverage report

St.❔	Category	Percentage	Covered / Total
🟡	Statements	74.47%	3727/5005
🟡	Branches	65.41%	2065/3157
🟡	Functions	66.7%	619/928
🟡	Lines	74.55%	3477/4664

Show files with reduced coverage 🔻

St.❔	File	Statements	Branches	Functions	Lines
🟢	... / fetch-with-timeout.ts	84.62% (-1.1% 🔻)	100%	66.67%	83.33% (-1.28% 🔻)
🔴	... / update-version-notifier.ts	34.43%	6.67% (-1.03% 🔻)	0%	34.55%

Test suite run success

615 tests passing in 89 suites.

Report generated by 🧪jest coverage report action from 0b8da1f

[lornajane]

I'm closing this as we're not actively working on it. If we get more replication cases, we should revisit.