Optimize SaveActivityInfoList insert

[NejcZdovc]

https://brave.sp.backtrace.io/p/brave/triage?filters=(_deleted%3D0%2C(callstack%2Ccontains%2Cledger))&sort=(ver%2Chead%2Cdesc)&aggregations=((ver%2Chead)%2C(guid%2Cunique)%2C(classifiers%2Chead))&fingerprint=7f718b9c452857bd88fb749ecc21bfbad63a02ff12c03cac17aaecd21310b6e6

We should just create object with publisher_key, percent and weight and not whole publisher insert. We should also batch insert it with batch query

[LaurenWags]

Verified passed with

Brave	1.11.65 Chromium: 83.0.4103.97 (Official Build) dev (64-bit)
Revision	326d148b9655369b86498d9ecca39f63dd2bdd2d-refs/branch-heads/4103@{#657}
OS	macOS Version 10.14.6 (Build 18G3020)

• Verified test plan from Optimise normalize list saves brave-core#5594
• Confirmed all AC publisher types added to auto contribute and DB (regular sites, YouTube, Vimeo, GitHub). Twitch publishers are not added, known issue logged with Twitch verified pubs are Not being added to a-c table #6142

Verification passed on

Brave | 1.11.78 Chromium: 83.0.4103.116 (Official Build) dev (64-bit)
-- | --
Revision | 8f0c18b4dca9b6699eb629be0f51810c24fb6428-refs/branch-heads/4103@{#716}
OS | Windows 10 OS Version 1903 (Build 18362.900)

• Verified test plan from Optimise normalize list saves brave-core#5594
• Confirmed all AC publisher types added to auto contribute and DB (regular sites, YouTube, Vimeo, GitHub).
  
  

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Verified passed with

Brave	1.11.87 Chromium: 83.0.4103.116 (Official Build) dev (64-bit)
Revision	8f0c18b4dca9b6699eb629be0f51810c24fb6428-refs/branch-heads/4103@{#716}
OS	Linux

• Verified test plan from Optimise normalize list saves brave-core#5594
• Confirmed all AC publisher types added to auto contribute and DB (regular sites, YouTube, Vimeo, GitHub). Twitch publishers are not added, known issue logged with Twitch verified pubs are Not being added to a-c table #6142