WIP ISSUE-569: Allow usage of ISO 8601 interval notations

[TomCools]

Description

Allow the use of ISO 8601 interval to get feature parity with: dapr/dapr#2513

Issue reference

#569

Please reference the issue this PR will close: #569

Checklist

Please make sure you've completed the relevant tasks for this PR, out of the following list:

• Code compiles correctly
• Created/updated tests
• Extended the documentation

[codecov]

Codecov Report

Merging #645 (97f6cbd) into master (91dd2fb) will decrease coverage by 0.08%.
The diff coverage is 84.89%.

@@             Coverage Diff              @@
##             master     #645      +/-   ##
============================================
- Coverage     77.25%   77.17%   -0.09%     
- Complexity      946      956      +10     
============================================
  Files            88       88              
  Lines          3012     3054      +42     
  Branches        334      338       +4     
============================================
+ Hits           2327     2357      +30     
- Misses          523      532       +9     
- Partials        162      165       +3     

Impacted Files	Coverage Δ
...va/io/dapr/actors/runtime/ActorReminderParams.java	89.65% <72.72%> (-10.35%)	⬇️
.../io/dapr/actors/runtime/ActorObjectSerializer.java	83.51% <83.33%> (-1.19%)	⬇️
...ain/java/io/dapr/actors/runtime/AbstractActor.java	85.52% <84.93%> (+0.19%)	⬆️
sdk/src/main/java/io/dapr/utils/DurationUtils.java	87.32% <88.57%> (-8.33%)	⬇️
...in/java/io/dapr/actors/runtime/DaprGrpcClient.java	95.50% <100.00%> (ø)

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[mukundansundar]

@TomCools Can you fix conflicts in the PR? And is the PR ready for review?

[cicoyle]

@TomCools mind resolving the conflicts?

[cicoyle]

gentle ping @TomCools

[cicoyle]

gentle ping @TomCools