Update 0.71.x with the latest localization.

[mkarolin]

QA:
Verify that the known localization gaps have been corrected.

[bsclifton]

Fixed with brave/brave-core#3922

[GeetaSarvadnya]

Verification passed on

Brave	0.71.114 Chromium: 78.0.3904.97 (Official Build) (64-bit)
Revision	021b9028c246d820be17a10e5b393ee90f41375e-refs/branch-heads/3904@{#859}
OS	Windows 10 OS Version 1803 (Build 17134.1006)

• Logged Localization is not applied for NTP rewards widget in German locale #6866
• Verified the localization for "Close" is translated as "Близко" which is a Russian word for "Nearby/Near" #6767 and Incognito still being generated from translated strings #2147

Verified passed with

Brave	0.71.114 Chromium: 78.0.3904.97 (Official Build) (64-bit)
Revision	021b9028c246d820be17a10e5b393ee90f41375e-refs/branch-heads/3904@{#859}
OS	macOS Version 10.13.6 (Build 17G5019)

• Verified "Close" is translated as "Близко" which is a Russian word for "Nearby/Near" #6767
• Verified Incognito still being generated from translated strings #2147
• Logged UK English sometimes Private/Private Window is not capitalized  #6872
• Reproduced ads panel description on brave://rewards is not translated #6868

Verification passed on

Brave	0.71.114 Chromium: 78.0.3904.97 (Official Build) (64-bit)
Revision	021b9028c246d820be17a10e5b393ee90f41375e-refs/branch-heads/3904@{#859}
OS	Ubuntu 18.04 LTS

• Verified "Close" is translated as "Близко" which is a Russian word for "Nearby/Near" #6767
• Verified Incognito still being generated from translated strings #2147
• Logged ads panel description on brave://rewards is not translated #6868