DIDRules view shows RSEs instead of RSE Expressions

[maany]

Description

The RSE column shown here in the DID Rules list is actually supposed to the RSE expression.

We should

1. rename the column to RSE Expression and remove the link to the RSE page.
2. Ensure any other Rules view do not show RSE Expression as RSE.

Steps to reproduce

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Rucio WebUI Version

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Additional Information

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