[Desktop] Auto-contribute doesn't process if more than four publishers are on the list

[NejcZdovc]

Description

Right now we have hard limit on 3 retries per step. Because when we are sending out suggestions we go through retry logic it will automatically finish after 4 publishers are process as this equals to 3 retries per step. We need to remove this limit for step STEP_PREPARE as this is expected to go over. We need to think over how to distinguish between valid retry and failed retry for this step.

Steps to Reproduce

1. enable rewards
2. add 6 verified publishers to AC table
3. trigger AC

Actual result:

Only 4 publishers are processed

Expected result:

All publishers should be processed.

Reproduces how often:

easily

Brave version (brave://version info)

this was introduced with version 1.10

Version/Channel Information:

• Can you reproduce this issue with the current release?
• Can you reproduce this issue with the beta channel?
• Can you reproduce this issue with the nightly channel?

Other Additional Information:

• Does the issue resolve itself when disabling Brave Shields?
• Does the issue resolve itself when disabling Brave Rewards?
• Is the issue reproducible on the latest version of Chrome?

Miscellaneous Information:

[GeetaSarvadnya]

Verification passed on

Brave | 1.12.105 Chromium: 84.0.4147.105 (Official Build) (64-bit)
-- | --
Revision | a6b12dfad6663f13a7e16e9a42a6a4975374096b-refs/branch-heads/4147@{#943}
OS | Windows 10 OS Version 1903 (Build 18362.959)

• Verified description from the issue and ensured that AC is processed for 6 publishers
  
  

---

Verified passed with

Brave | 1.12.105 Chromium: 84.0.4147.105 (Official Build) (64-bit)
-- | --
Revision | a6b12dfad6663f13a7e16e9a42a6a4975374096b-refs/branch-heads/4147@{#943}
OS | macOS Version 10.14.6 (Build 18G3020)

• Verified STR from description
• Confirmed AC completed for 6 publishers in the list:

---

Verification passed on

Brave	1.12.107 Chromium: 84.0.4147.105 (Official Build) (64-bit)
Revision	a6b12dfad6663f13a7e16e9a42a6a4975374096b-refs/branch-heads/4147@{#943}
OS	Ubuntu 18.04 LTS

• Verified STR from description
• Confirmed AC completed for 5 publishers in the list: