Migrate "Person X" default profile name to "Profile X" for all languages

[petemill]

Description

Related to #5789 (generate new profiles with "Profile X" name instead of "Person X")
Related to #5665 (rename instances of "People"/"Person" to "Profile"

Test plan / Steps to Reproduce

1. With a previous version of Brave
2. Create a new profile
3. Observe that first and new profile are created in the format "Person X" (in the user's language)
4. Quit Brave
5. Open the version of Brave with a fix for this issue, against that user directory used in the previous steps.
6. Open Profiles menu in Toolbar
   ---> Observe that all profiles are now in the format "Profile X"

[btlechowski]

Verification passed on

Brave	0.70.109 Chromium: 77.0.3865.90 (Official Build) beta (64-bit)
Revision	58c425ba843df2918d9d4b409331972646c393dd-refs/branch-heads/3865@{#830}
OS	Ubuntu 18.04 LTS

Verified that Person x is renamed to Profile x
Before upgrade from 0.69.132

After Upgrade to 0.70.x

Verified that profiles with custom name are not renamed

Logged #6345

Verification passed on

Brave	0.70.111 Chromium: 77.0.3865.90 (Official Build) beta (64-bit)
Revision	58c425ba843df2918d9d4b409331972646c393dd-refs/branch-heads/3865@{#830}
OS	Windows 10 OS Version 1803 (Build 17134.1006)

• Verified the STR from the description
• Encountered Inconsistent automatic profile renaming on upgrade #6345

Verified passed with

Brave	0.70.111 Chromium: 77.0.3865.90 (Official Build) beta (64-bit)
Revision	58c425ba843df2918d9d4b409331972646c393dd-refs/branch-heads/3865@{#830}
OS	macOS Version 10.13.6 (Build 17G5019)

• Verified the STR from the description
• Verified that profiles with custom name are not renamed
• Encountered Inconsistent automatic profile renaming on upgrade #6345

Using 0.69.132

After Upgrade to 0.70.x