feat: move from dynectsoap to dynsoap

[PG2000]

Description

This change removes the use of dynectsoap library from dyn provider since it is not licensed or actively being maintained and is missing the usage of a proxy.
It introduces a similar library https://github.com/PG2000/dynsoap which uses more generated code and has a MIT License

Fixes #1787

Checklist

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[PG2000]

I signed it

[PG2000]

/assign @njuettner

[Raffo]

@PG2000 to prevent other problems with the maintenance of the library, given that most seems to be generated, can't we just add all the files to ExternalDNS transferring its ownership and remove completely the external dependency?

[PG2000]

@PG2000 to prevent other problems with the maintenance of the library, given that most seems to be generated, can't we just add all the files to ExternalDNS transferring its ownership and remove completely the external dependency?

@Raffo
absolutely. The generated file (it implements all soap functions) is about 1,2 MB in size. If thats ok i will prepare it

[Raffo]

@PG2000 Yes it's not a problem.

[PG2000]

@Raffo i transferred all files to this project.

How can i exclude the generated code from code coverage report?

[PG2000]

@Raffo can i help somehow?

[seanmalloy]

/kind cleanup

[Raffo]

@PG2000 please review the method comments and align to the go convention as I mentioned in my comment. After you do that we can totally merge this PR!

[PG2000]

@Raffo done!

[Raffo]

/approve
/lgtm

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: PG2000, Raffo

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