task API listing should have the query parameters

[kumarashit]

Is this a BUG REPORT or FEATURE REQUEST?:

Uncomment only one, leave it on its own line:

/kind bug /kind feature

What happened: rather than having execution id as the filter, it should work on query parameter filtering

What you expected to happen:

How to reproduce it (as minimally and precisely as possible):

Anything else we need to know?:

Environment:

• Orchestration(release/branch) version:
• OS (e.g. from /etc/os-release):
• Kernel (e.g. uname -a):
• Install tools:
• Others:

[kumarashit]

Low pri. Can be taken as backlog as in this release we haven't focussed much on the task level granularity