enhance: retry etcd server start with 3 default retries

[charleskakumanu]

Added retry method and unit test cases for retrying etcd server start.
New to open source and Go language. Please reject if this is not the requirement/ specify the modifications needed in code.
issue : #17569

[mergify]

@charleskakumanu Thanks for your contribution. Please submit with DCO, see the contributing guide https://github.com/milvus-io/milvus/blob/master/CONTRIBUTING.md#developer-certificate-of-origin-dco.

[mergify]

@charleskakumanu

Invalid PR Title Format Detected

Your PR submission does not adhere to our required standards. To ensure clarity and consistency, please meet the following criteria:

1. Title Format: The PR title must begin with one of these prefixes:

• feat: for introducing a new feature.
• fix: for bug fixes.
• enhance: for improvements to existing functionality.
• test: for add tests to existing functionality.
• doc: for modifying documentation.
• auto: for the pull request from bot.

2. Description Requirement: The PR must include a non-empty description, detailing the changes and their impact.

Required Title Structure:

[Type]: [Description of the PR]

Where Type is one of feat, fix, enhance, test or doc.

Example:

enhance: improve search performance significantly 

Please review and update your PR to comply with these guidelines.

[mergify]

@charleskakumanu E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.

[charleskakumanu]

/run-cpu-e2e

[charleskakumanu]

/assign @xiaofan-luan

[xiaofan-luan]

/lgtm
/approve

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: charleskakumanu, xiaofan-luan

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• internal/kv/OWNERS [xiaofan-luan]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[amaypatil]

@xiaofan-luan which release are we targetting this ? I see it was merged with master as well.

[xiaofan-luan]

If we cherry pick this to 2.4 branch, we can release at 2.4.8

Other than that it will be 2.5