docs: Deprecate SNS and publish relocation information

[SMadani]

This is likely the last commit and release to com.vonage:client and the 7.x branch. It is mainly a cleanup and "FYI" type of release. As such, it contains no actual changes other than deprecation annotations.

[codecov-commenter]

Codecov Report

Merging #494 (bccdab9) into main (64e4ea6) will not change coverage.
The diff coverage is n/a.

❗ Current head bccdab9 differs from pull request most recent head c2d036a. Consider uploading reports for the commit c2d036a to get more accurate results

@@            Coverage Diff            @@
##               main     #494   +/-   ##
=========================================
  Coverage     93.95%   93.95%           
  Complexity     2592     2592           
=========================================
  Files           380      380           
  Lines          6521     6521           
  Branches        430      430           
=========================================
  Hits           6127     6127           
  Misses          218      218           
  Partials        176      176           

Files	Coverage Δ
src/main/java/com/vonage/client/HttpWrapper.java	100.00% <ø> (ø)
src/main/java/com/vonage/client/VonageClient.java	98.88% <ø> (ø)
.../java/com/vonage/client/legacyutils/XmlParser.java	72.72% <ø> (ø)
...in/java/com/vonage/client/legacyutils/XmlUtil.java	72.72% <ø> (ø)
...n/java/com/vonage/client/logging/LoggingUtils.java	93.75% <ø> (ø)
...in/java/com/vonage/client/redact/RedactClient.java	100.00% <ø> (ø)
...n/java/com/vonage/client/redact/RedactRequest.java	85.71% <ø> (ø)
src/main/java/com/vonage/client/sns/SnsClient.java	100.00% <ø> (ø)
...m/vonage/client/sns/request/SnsPublishRequest.java	100.00% <ø> (ø)
...java/com/vonage/client/sns/request/SnsRequest.java	100.00% <ø> (ø)
... and 4 more