[STSK10] CloudWatch log investigation, export, and regex search module

[vexance]

Requesting new module aws/enum/authed/cloudwatch_log_inspector which will search cloudwatch logs for sensitive information such as

• Access key ids, secrets, and session tokens
• API keys
• Usernames & passwords
• SSO / Federation sign-on messages and URLs
• S3 pre-signed URLs
• Private keys (e.g., SSH)
• Account Ids, particularly those not of the target account - search via ARNs

Information matching a set of specified regular expressions should be printed to the framework. The following module options should be supported:

• LOG_GROUP (str): Name of the log group to investigate / collect logs within.
• LOG_STREAM (Optional - str): Specific stream within a log group to scope investigation to. Default value of none will cause the module to first list streams within the group and then investigate events within all of them.
• REGION (str): AWS region which will override the default if necessary (default: framework config setting)
• EVENT_LIMIT (int): Maximum number of events to extract from each log stream (default: 10,000)
• TIME_DELTA (int): Number of hours back to filter logs on (default: 336 == 14 days)
• EXPORT_DIRECTORY (Optional): Path to an existing directory on the local filesystem to download logstream events to. When specified, validate the directory exists. When set to None, this will cause the module to NOT download the log files locally (default: None)

Note: Recommend getting inspiration from trufflehog for regex patterns.

[vexance]

As part of this we also will need to create a pre-defined list of regexes which may be useful for identifying sensitive info. Include this list by default within the stratustryke data directory

[vexance]

Implemented in #41, closing!