[ENHANCE] Feature completeness for Pingdom create Alert API

[karlderkaefer]

Is your feature request related to a problem? Please describe.
Hi we would like to use pingdom, however it seems stakater does not cover full API spec of pingdom. I have created following table for feature completeness

Pingdom API Feature	Supported by Stakater Ingress Monitor Controller	Description
sendnotificationwhendown	Supported (as SendNotificationWhenDown)	How many failed check attempts before notifying
notifywhenbackup	Supported (as NotifyWhenBackUp)	Set to 'false' to disable recovery notifications
auth	Supported (as BasicAuthUser)	Username and password, colon-separated.
paused	Supported	Set to 'true' to pause checks
requestheaders	Supported	Custom Pingdom request headers (e.g. {"Accept"="application/json"})
resolution	Supported	The Pingdom check interval in minutes
shouldcontain	Supported	Set to text string that must be present in the HTML code of the page
tags	Supported	Comma-separated set of tags to apply to check (e.g. "testing,aws")
teamids	Supported (as teamAlertContacts)	Teams to alert. Comma-separated integers.
integrationids	Supoorted (as alertIntegrations)	Integration identifiers. For example, [1,2,3].
userids	Supported (as alertContacts)	User identifiers. For example, 154325,465231,765871.
ssl_down_days_before	Supported	Treat as down if a certificate expires within specified days.
verify_certificate	Supported	Treat as down if an invalid/unverifiable certificate is found.
encryption	Supported by url scheme	Connection encryption.
custom_message	Not mentioned	Custom message added to email and webhook alerts.
ipv6	Not mentioned	Use IPv6 instead of IPv4.
notifyagainevery	Not mentioned	Notify again every n result. 0 means no extra notifications.
postdata	Not mentioned	Data posted to the web page, e.g., submission data for forms.
probe_filters	Not mentioned	Filters for probe selections, e.g., "region: NA".
responsetime_threshold	Not mentioned	Triggers a down alert if the response time exceeds specified ms (not available for Starter and Free plans).
shouldnotcontain	Not mentioned	Target site should NOT contain this string.
type	Not mentioned	Type of check, e.g."http" "httpcustom" "tcp" "ping" "dns" "udp" "smtp" "pop3" "imap".

Describe the solution you'd like
I would like to create a PR. Please let me know if that makes sense from your point of view or any other tipps before I make effort. I see that you are using external library that is archived now. So I would need to create a fork first. we could maintain this in fork in SAP context.

Describe alternatives you've considered

Additional context
Add any other context or screenshots about the feature request here.

[MuneebAijaz]

@karlderkaefer feel free to make a Pull request with required changes. For the library issue, could we find another library which could cover our usecases? That would be the best scenario.

[karlderkaefer]

@MuneebAijaz I'm afraid there is no other library to my knowledge. We have the openAPIv3 spec from pingdom you can download from the top https://docs.pingdom.com/api/ and code could be generated out of that spec. I think a new repository has to been built. However when #556 is merged, we have covered our requirements. Maybe I can create a new client in my freetime. Also we are in contact with the company solarwinds which has aquired pingdom. I'm asking them if they can provide a go client by themselves. This would be the ideal option.

[karlderkaefer]

I have added new golang client for pingdom https://github.com/karlderkaefer/pingdom-golang-client I can provide a PR to switch to new maintained client

[karl-johan-grahn]

@karlderkaefer what did solarwinds say about them providing a go client?

[karlderkaefer]

@karl-johan-grahn Solarwind will not provide a golang client implementation unfortunately. Maybe they can takeover the created client I will ask them again