ci: sanitize hive workspace-log artifact names

[yperbasis]

Summary

Hive workspace logs (simulator output + erigon client logs) are uploaded with the matrix values interpolated into the artifact name:

name: hive-workspace-log-${{ matrix.sim }}-${{ matrix.sim-limit }}-${{ matrix.exec_mode }}

actions/upload-artifact forbids /, | and * in artifact names, so the upload fails for every leg whose name contains them — i.e. all ethereum/engine, ethereum/rpc-compat (.* limit) and devp2p-eth|discv5 legs. The failure is masked by the step's continue-on-error: true, so the logs just silently vanish:

##[error]The artifact name is not valid: hive-workspace-log-devp2p-eth|discv5-parallel. Contains the following character:  Vertical bar |

Only hive-workspace-log-devp2p-eth-serial ever uploaded. This bit during the investigation of the BlobViolations flake behind #21597: the failing parallel-leg run (https://github.com/erigontech/erigon/actions/runs/26867180780) had no workspace-log artifact, and the root-cause analysis had to be reconstructed from the job stdout.

Fix

Compute the artifact name in a small step that replaces any character outside [A-Za-z0-9._-] with _. Resulting names per leg:

before (invalid ones rejected)	after
hive-workspace-log-ethereum/engine-exchange-capabilities|auth-serial	hive-workspace-log-ethereum_engine-exchange-capabilities_auth-serial
hive-workspace-log-ethereum/engine-cancun-parallel	hive-workspace-log-ethereum_engine-cancun-parallel
hive-workspace-log-ethereum/rpc-compat-.*-serial	hive-workspace-log-ethereum_rpc-compat-._-serial
hive-workspace-log-devp2p-eth|discv5-parallel	hive-workspace-log-devp2p-eth_discv5-parallel
hive-workspace-log-devp2p-eth-serial (worked)	unchanged

test-hive-eest.yml (matrix.shard values like paris+shanghai; + is allowed) and release.yml artifact names contain no forbidden characters, so they are left alone.

Validated with actionlint and by evaluating the substitution against every matrix combination.

[Copilot]

Pull request overview

This PR fixes missing Hive workspace log artifacts in CI by sanitizing the artifact name so it always conforms to actions/upload-artifact naming constraints. This ensures simulator/client logs are consistently uploaded for all matrix legs (including those with /, |, * in interpolated values), instead of silently failing.

Changes:

• Add a step to compute a sanitized artifact name by replacing characters outside [A-Za-z0-9._-] with _.
• Use the computed sanitized name for the actions/upload-artifact workspace log upload.

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[Giulio2002]

LGTM — sanitizes artifact names for GitHub Actions so hive workspace logs upload reliably despite matrix values containing invalid characters.