Sync eng/common directory with azure-sdk-tools for PR 3860 (#3871)

* updating pfx and cert
* update the targeted version of the proxy as well

Co-authored-by: scbedd <45376673+scbedd@users.noreply.github.com>

eng/common/testproxy/dotnet-devcert.crt

@@ -1,20 +1,20 @@
 -----BEGIN CERTIFICATE-----
-MIIDSDCCAjCgAwIBAgIUPMKpJ/j10eQrcQBNnkImIaOYHakwDQYJKoZIhvcNAQEL
-BQAwFDESMBAGA1UEAwwJbG9jYWxob3N0MB4XDTIxMDgwNTAwMzU1NloXDTIyMDgw
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-AAOCAQ8AMIIBCgKCAQEAxe/ZseXgOTVoF7uTjX5Leknk95jIoyGc+VlxA8BhzGOr
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-WH7r76oRQMX904mOMdryQwZLObsqX4dXIEbafKVSecB3PBVIhv8gVtJhcZbQP1pI
-mMiWd6PHv46ZhGf7+cKnYUSa8Ia2t/wetK1wd00dFwIDAQABo4GRMIGOMA8GA1Ud
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+AAOCAQ8AMIIBCgKCAQEA0UPG7ER++5/9D/qa4SCtt7QvdHwcpidbwktPNU8iRW7V
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-byMeSZLbB5dPzn341DK0qfJEJMMgL0XsPEVZ3TQ6Alc9zq5wI608C/mXnz3xJE05
-UTYD8pRJJ/DyG0empvOVE8Sg93msHPquAbgqO9aqCpykgg/a8CFvI4wRdfvGEFlv
-8XJKL8Y/PFsmFeO3axq3zUYKFVdc9Un4dFIaag==
+9w0BAQsFAAOCAQEARX4NxGbycdPVuqvu/CO+/LpWrEm1OcOl7N57/mD5npTIJT78
+TYtXk1J61akumKdf5CaBgCDRcl35LhioFZIMEsiOidffAp6t493xocncFBhIYYrZ
+HS6aKsZKPu8h3wOLpYu+zh7f0Hx6pkHPAfw4+knmQjDYomz/hTwuo/MuT8k6Ee7B
+NGWqxUamLI8bucuf2ZfT1XOq83uWaFF5KwAuVLhpzo39/TmPyYGnaoKRYf9QjabS
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+MNMNfyJHSMEMFIT2D1UaQiwryXWQWJ93OiSdjA==
 -----END CERTIFICATE-----

eng/common/testproxy/target_version.txt

@@ -1 +1 @@
-1.0.0-dev.20220630.4
+1.0.0-dev.20220805.3