testing that Attester search is disabled on some domains

[tomholub]

test that attester search is disabled for some domains + test that WKD is used for looking up public keys

details tbd

[tomholub]

For this, will need a way to mock FES responses. Similar to #711 - need our own FES instance for UI tests and need the app to listen to it. I suppose it would be easier to start with FES since the API is simple and obvious.

[tomholub]

After #1158 lands, this will be actionable.

Relevant documentation for FES client configuration (also called org rules) https://flowcrypt.com/docs/business/org-rules.html

Both Attester and FES can now be mocked.

Test case 1: can find email on attester

1. set FES mock clientConfiguration to {flags: ["NO_PRV_CREATE", "NO_PRV_BACKUP", "NO_ATTESTER_SUBMIT", "PRV_AUTOIMPORT_OR_AUTOGEN", "FORBID_STORING_PASS_PHRASE"], key_manager_url: "https://ekm.flowcrypt.com"}. Set attester mock configuration to {servedPubkeys: {'available.on@attester.test': attesterPublicKeySamples.valid}}. Start mock
2. search available.on@attester.test recipient
3. it should find a public key (green)

Test case 2: cannot find email on attester with disallow_attester_search_for_domains=*

1. set FES mock clientConfiguration to {flags: ["NO_PRV_CREATE", "NO_PRV_BACKUP", "NO_ATTESTER_SUBMIT", "PRV_AUTOIMPORT_OR_AUTOGEN", "FORBID_STORING_PASS_PHRASE"], key_manager_url: "https://ekm.flowcrypt.com", disallow_attester_search_for_domains: ["*"]}. Set attester mock configuration to {servedPubkeys: {'available.on@attester.test': attesterPublicKeySamples.valid}}. Start mock
2. search available.on@attester.test recipient
3. it should NOT find any result

Test case 3:respects disallow_attester_search_for_domains on a per-domain basis

1. set FES mock clientConfiguration to {flags: ["NO_PRV_CREATE", "NO_PRV_BACKUP", "NO_ATTESTER_SUBMIT", "PRV_AUTOIMPORT_OR_AUTOGEN", "FORBID_STORING_PASS_PHRASE"], key_manager_url: "https://ekm.flowcrypt.com", disallow_attester_search_for_domains: ["disabled.test"]}. Set attester mock configuration to {servedPubkeys: {'attester@disabled.test': attesterPublicKeySamples.valid, 'attester@enabled.test': attesterPublicKeySamples.valid}}. Start mock
2. search attester@disabled.test recipient
3. it should NOT find any result
4. search attester@enabled.test recipient
5. it should find a result

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