chore: updates for developnet

[gartnera]

Description

• build on ubuntu 20.04 for lower glibc version (related to ci: upload zetacore/zetaclient binaries from build #2175)
• parameterize upgrade orchestrator binary urls and allow overriding
• follow redirects when downloading binary to get version

Relates to DEVOP-642

[CryptoFewka]

Looks good. I'd like to switch off of 20.04 in favor of something more recent, but if it's blocking something we can use 20.04 for the time being.

[gitguardian]

⚠️ GitGuardian has uncovered 2 secrets following the scan of your pull request.

Please consider investigating the findings and remediating the incidents. Failure to do so may lead to compromising the associated services or software components.

🔎 Detected hardcoded secrets in your pull request

GitGuardian id	GitGuardian status	Secret	Commit	Filename
11033145	Triggered	Generic High Entropy Secret	12edde8	cmd/zetae2e/local/accounts.go	View secret
11033146	Triggered	Generic High Entropy Secret	12edde8	cmd/zetae2e/local/accounts.go	View secret

🛠 Guidelines to remediate hardcoded secrets

1. Understand the implications of revoking this secret by investigating where it is used in your code.
2. Replace and store your secret safely. Learn here the best practices.
3. Revoke and rotate this secret.
4. If possible, rewrite git history. Rewriting git history is not a trivial act. You might completely break other contributing developers' workflow and you risk accidentally deleting legitimate data.

To avoid such incidents in the future consider

• following these best practices for managing and storing secrets including API keys and other credentials
• install secret detection on pre-commit to catch secret before it leaves your machine and ease remediation.

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^{🦉 GitGuardian detects secrets in your source code to help developers and security teams secure the modern development process. You are seeing this because you or someone else with access to this repository has authorized GitGuardian to scan your pull request.}