[New Rules] UEBA GItHub BBRs and Rules (#3174)

* [New Rules] UEBA GItHub BBRs and Rules

A new set of BBRs and rules that will be used to trigger new UEBA GitHub threshold Rules.

* Update rules/integrations/github/impact_github_member_removed_from_organization.toml

* Apply suggestions from code review

Co-authored-by: Ruben Groenewoud <78494512+Aegrah@users.noreply.github.com>

* edited BBR rules

-removed newly added member rule

* updated integration manifests and schemas

* Updated min_stack for some rules based on newest GitHub integration schema manifest

* testing min_stack bump to 8.8 for new fields

* removing offending rule to troubleshoot seperately

* added UEBA tags and created UEBA threshold rule

* updated non-ecs-schema to add signal.rule.tags

* updated non-ecs-schema with kibana.alert.workflow_status

* updated rule.threat.tactic

* added user.name to non-ecs-schema

* added quotes to kibana.alert.workflow_status value

* removed trailing space from rule name

* update tags and optimize query for UEBA threshold rule

* removed integration field from Higher-Order rule

* Apply suggestions from code review

Co-authored-by: Terrance DeJesus <99630311+terrancedejesus@users.noreply.github.com>

* adjusted new_terms order and rule types based on review feedback

* Apply suggestions from code review

Co-authored-by: Ruben Groenewoud <78494512+Aegrah@users.noreply.github.com>

* remove user.name from detection_rules/etc/non-ecs-schema.json

* fix json formatting

---------

Co-authored-by: Ruben Groenewoud <78494512+Aegrah@users.noreply.github.com>
Co-authored-by: Colson Wilhoit <48036388+DefSecSentinel@users.noreply.github.com>
Co-authored-by: Terrance DeJesus <99630311+terrancedejesus@users.noreply.github.com>
Co-authored-by: Justin Ibarra <16747370+brokensound77@users.noreply.github.com>
Co-authored-by: Mika Ayenson <Mikaayenson@users.noreply.github.com>

rules/integrations/github/persistence_github_org_owner_added.toml

@@ -4,7 +4,7 @@ integration = ["github"]
 maturity = "production"
 min_stack_comments = "New fields added: required_fields, related_integrations, setup"
 min_stack_version = "8.3.0"
-updated_date = "2023/09/11"
+updated_date = "2023/12/14"
 
 [rule]
 author = ["Elastic"]
@@ -21,7 +21,12 @@ name = "New GitHub Owner Added"
 risk_score = 47
 rule_id = "24401eca-ad0b-4ff9-9431-487a8e183af9"
 severity = "medium"
-tags = ["Domain: Cloud", "Use Case: Threat Detection", "Tactic: Persistence", "Data Source: Github"]
+tags = ["Domain: Cloud", 
+        "Use Case: Threat Detection",
+        "Use Case: UEBA",        
+        "Tactic: Persistence", 
+        "Data Source: Github"
+        ]
 timestamp_override = "event.ingested"
 type = "eql"
 query = '''