Create rule S7175: Linear API keys should not be disclosed (#4594)

rules/S7175/metadata.json

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+{
+}

rules/S7175/secrets/metadata.json

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+{
+  "title": "Linear API keys should not be disclosed",
+  "type": "VULNERABILITY",
+  "code": {
+    "impacts": {
+      "SECURITY": "HIGH"
+    },
+    "attribute": "TRUSTWORTHY"
+  },
+  "status": "ready",
+  "remediation": {
+    "func": "Constant\/Issue",
+    "constantCost": "30min"
+  },
+  "tags": [
+    "cwe",
+    "cert"
+  ],
+  "defaultSeverity": "Blocker",
+  "ruleSpecification": "RSPEC-7175",
+  "sqKey": "S7175",
+  "scope": "All",
+  "securityStandards": {
+    "CWE": [
+      798,
+      259
+    ],
+    "OWASP": [
+      "A3"
+    ],
+    "CERT": [
+      "MSC03-J."
+    ],
+    "OWASP Top 10 2021": [
+      "A7"
+    ],
+    "PCI DSS 3.2": [
+      "6.5.10"
+    ],
+    "PCI DSS 4.0": [
+      "6.2.4"
+    ],
+    "ASVS 4.0": [
+      "2.10.4",
+      "3.5.2",
+      "6.4.1"
+    ],
+    "STIG ASD_V5R3": [
+      "V-222642"
+    ]
+  },
+  "defaultQualityProfiles": [
+    "Sonar way"
+  ],
+  "quickfix": "unknown"
+}

rules/S7175/secrets/rule.adoc

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+
+include::../../../shared_content/secrets/description.adoc[]
+
+== Why is this an issue?
+
+include::../../../shared_content/secrets/rationale.adoc[]
+
+=== What is the potential impact?
+
+Below are some real-world scenarios that illustrate some impacts of an attacker
+exploiting the secret.
+
+include::../../../shared_content/secrets/impact/financial_loss.adoc[]
+
+include::../../../shared_content/secrets/impact/data_compromise.adoc[]
+
+== How to fix it
+
+include::../../../shared_content/secrets/fix/revoke.adoc[]
+
+include::../../../shared_content/secrets/fix/vault.adoc[]
+
+=== Code examples
+
+:example_secret: lin_oauth_1462cb9a9d462cab2d2992281cb8e94b972cdebe8a33e72067383fd1d4a6ea23
+:example_name: linear-key
+:example_env: LINEAR_KEY
+
+include::../../../shared_content/secrets/examples.adoc[]
+
+== Resources
+
+include::../../../shared_content/secrets/resources/standards.adoc[]