[FEATURE] Amazon Inspector ECR re-scan settings - allow for more options

[joegajeckyj]

Is your feature request related to a problem? Please describe

Currently only able to set the re-scan duration for inspector to LIFETIME|DAYS_30|DAYS_180

params.update(parameter_pattern_validator("ECR_SCAN_DURATION", os.environ.get("ECR_SCAN_DURATION"), pattern=r"^(LIFETIME|DAYS_30|DAYS_180){1}$"))

Describe the solution you'd like

Allow all the selections that the API accepts i.e.

response = client.update_configuration(
    ec2Configuration={
        'scanMode': 'EC2_SSM_AGENT_BASED'|'EC2_HYBRID'
    },
    ecrConfiguration={
        'pullDateRescanDuration': 'DAYS_14'|'DAYS_30'|'DAYS_60'|'DAYS_90'|'DAYS_180',
        'rescanDuration': 'LIFETIME'|'DAYS_30'|'DAYS_180'|'DAYS_14'|'DAYS_60'|'DAYS_90'
    }
)

Describe alternatives you've considered

we have set to 30 for now while we await the ability to set lower

Additional context

Parameter setting in sra-inspector-org-main-ssm.json
{
"ParameterKey": "pEcrRescanDuration",
"ParameterValue": "LIFETIME"
}

[joegajeckyj]

Additionally there is a bug with the boto3 current lambda that if you set the pullDateRescanDuration manually in the delegated admin account that it gets reset to default 90 days the next time the lambda runs, so it should be also added that you can set this value too